123
FZUS51 KBOX 162304
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
703 PM EDT SUN AUG 16 2026
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 60 NM
ANZ200-171200-
703 PM EDT SUN AUG 16 2026
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
HIGH PRES SHIFTS EAST OF THE WATERS TONIGHT. LOW PRES THEN
APPROACHES FROM THE WEST BRINGING GUSTY S WINDS AND BUILDING SEAS
THAT HAVE PROMPTED SMALL CRAFT ADVISORIES LATE TONIGHT INTO MON. THE
ASSOCIATED COLD FRONT CROSSES THE REGION LATE MON INTO MON NIGHT.
HIGH PRES RETURNS TUE AND WED MOVING OFF THE COAST THU AHEAD OF THE
NEXT COLD FRONT.
ANZ250-171200-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
703 PM EDT SUN AUG 16 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH
MONDAY EVENING...
TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
AROUND 3 FT. WAVE DETAIL: S 2 FT AT 3 SECONDS AND E 1 FOOT AT
3 SECONDS. A CHANCE OF SHOWERS AFTER MIDNIGHT.
MON
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
4 FT. WAVE DETAIL: SE 3 FT AT 4 SECONDS AND SE 1 FOOT AT
10 SECONDS. A CHANCE OF SHOWERS. PATCHY FOG IN THE AFTERNOON WITH
VSBY 1 TO 3 NM.
MON NIGHT
SE WINDS 5 TO 10 KT, BECOMING NE AFTER MIDNIGHT.
SEAS 2 TO 4 FT. WAVE DETAIL: SE 3 FT AT 4 SECONDS AND SE 1 FOOT
AT 10 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS. VSBY 1 TO 3 NM.
TUE
N WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE 3 FT
AT 8 SECONDS AND SE 2 FT AT 5 SECONDS. PATCHY FOG IN THE MORNING
WITH VSBY 1 TO 3 NM.
TUE NIGHT
NE WINDS AROUND 5 KT, BECOMING NW AROUND 5 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: SE 3 FT AT 8 SECONDS AND
SW 3 FT AT 11 SECONDS.
WED AND WED NIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: S 3 FT AT 7 SECONDS AND NE 1 FOOT AT 4 SECONDS.
THU AND THU NIGHT
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT. A
CHANCE OF SHOWERS.
FRI AND FRI NIGHT
NE WINDS 5 TO 10 KT, BECOMING SE. SEAS 2 TO
3 FT.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ251-171200-
MASSACHUSETTS BAY AND IPSWICH BAY-
703 PM EDT SUN AUG 16 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH
MONDAY EVENING...
TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: SE 2 FT AT 3 SECONDS AND SE 1 FOOT AT
11 SECONDS. A CHANCE OF SHOWERS AFTER MIDNIGHT.
MON
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: SE 2 FT AT 4 SECONDS AND SE 1 FOOT AT
10 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS. VSBY 1 TO 3 NM.
MON NIGHT
SE WINDS 5 TO 10 KT, BECOMING NE AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: SE 2 FT AT 4 SECONDS AND SE 1 FOOT
AT 10 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS. VSBY 1 TO 3 NM IN
THE EVENING.
TUE
NE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: E 2 FT
AT 9 SECONDS AND SE 1 FOOT AT 4 SECONDS. PATCHY FOG IN THE
MORNING.
TUE NIGHT
NE WINDS AROUND 5 KT, BECOMING W AFTER MIDNIGHT.
SEAS AROUND 2 FT. WAVE DETAIL: SE 2 FT AT 10 SECONDS AND NE
1 FOOT AT 5 SECONDS.
WED AND WED NIGHT
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: E 2 FT AT 8 SECONDS AND S 2 FT AT 10 SECONDS.
THU AND THU NIGHT
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT. A
CHANCE OF SHOWERS.
FRI AND FRI NIGHT
NE WINDS 5 TO 10 KT, BECOMING SE. SEAS
AROUND 2 FT.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ231-171200-
CAPE COD BAY-
703 PM EDT SUN AUG 16 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH
MONDAY EVENING...
TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: S 1 FOOT AT 2 SECONDS AND NE 1 FOOT AT
3 SECONDS. A CHANCE OF SHOWERS AFTER MIDNIGHT.
MON
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
4 FT. WAVE DETAIL: SE 1 FOOT AT 3 SECONDS AND SE 1 FOOT AT
10 SECONDS. A CHANCE OF SHOWERS. PATCHY FOG IN THE AFTERNOON WITH
VSBY 1 TO 3 NM.
MON NIGHT
SE WINDS 5 TO 10 KT, BECOMING NE AFTER MIDNIGHT.
SEAS AROUND 2 FT. WAVE DETAIL: SE 2 FT AT 10 SECONDS AND SE
1 FOOT AT 3 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS IN THE
EVENING. VSBY 1 TO 3 NM.
TUE
N WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: NE
1 FOOT AT 2 SECONDS AND SW 1 FOOT AT 6 SECONDS. PATCHY FOG IN THE
MORNING.
TUE NIGHT
N WINDS AROUND 5 KT, BECOMING NW AFTER MIDNIGHT.
SEAS AROUND 2 FT. WAVE DETAIL: N 1 FOOT AT 3 SECONDS AND SE
1 FOOT AT 10 SECONDS.
WED AND WED NIGHT
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: SW 1 FOOT AT 3 SECONDS AND NE 1 FOOT AT 4 SECONDS.
THU AND THU NIGHT
N WINDS AROUND 5 KT, BECOMING W. SEAS 1 FOOT
OR LESS. A CHANCE OF SHOWERS.
FRI AND FRI NIGHT
NE WINDS 5 TO 10 KT, BECOMING SE. SEAS
AROUND 2 FT, THEN 1 FOOT OR LESS.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ254-171200-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
703 PM EDT SUN AUG 16 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH
MONDAY EVENING...
TONIGHT
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: S 2 FT AT 4 SECONDS AND NE 1 FOOT AT
3 SECONDS. A SLIGHT CHANCE OF SHOWERS AFTER MIDNIGHT.
MON
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
5 FT. WAVE DETAIL: SE 3 FT AT 4 SECONDS AND SE 1 FOOT AT
9 SECONDS. A CHANCE OF SHOWERS. PATCHY FOG IN THE AFTERNOON WITH
VSBY 1 TO 3 NM.
MON NIGHT
SE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
BECOMING E 5 TO 10 KT AFTER MIDNIGHT. SEAS 3 TO 5 FT. WAVE
DETAIL: SE 3 FT AT 5 SECONDS AND SE 2 FT AT 10 SECONDS. PATCHY
FOG. A CHANCE OF SHOWERS. VSBY 1 TO 3 NM.
TUE
N WINDS AROUND 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: SE 4 FT
AT 8 SECONDS AND S 3 FT AT 7 SECONDS. PATCHY FOG IN THE MORNING
WITH VSBY 1 TO 3 NM.
TUE NIGHT
NW WINDS 5 TO 10 KT. SEAS 2 TO 4 FT. WAVE DETAIL: SE
4 FT AT 8 SECONDS AND NE 2 FT AT 4 SECONDS.
WED AND WED NIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: SE 2 FT AT 6 SECONDS.
THU
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. A CHANCE OF SHOWERS.
THU NIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. A CHANCE OF
SHOWERS.
FRI AND FRI NIGHT
NE WINDS 5 TO 10 KT, BECOMING E. SEAS 2 TO
3 FT.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ255-171200-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
703 PM EDT SUN AUG 16 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM EDT MONDAY THROUGH
LATE MONDAY NIGHT...
TONIGHT
S WINDS 10 TO 15 KT. SEAS 2 TO 4 FT. WAVE DETAIL: S
3 FT AT 4 SECONDS AND NE 1 FOOT AT 4 SECONDS. A SLIGHT CHANCE OF
SHOWERS AFTER MIDNIGHT.
MON
S WINDS 15 TO 20 KT. SEAS 4 TO 6 FT. WAVE DETAIL: SE 4 FT
AT 5 SECONDS AND SE 1 FOOT AT 8 SECONDS. PATCHY FOG. SHOWERS
LIKELY, MAINLY IN THE MORNING. VSBY 1 TO 3 NM.
MON NIGHT
SE WINDS 10 TO 15 KT, BECOMING NE AFTER MIDNIGHT.
SEAS 4 TO 6 FT. WAVE DETAIL: SE 4 FT AT 6 SECONDS AND SE 2 FT AT
11 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS IN THE EVENING. VSBY
1 TO 3 NM.
TUE
N WINDS 5 TO 10 KT. SEAS 3 TO 5 FT. WAVE DETAIL: S 5 FT AT
8 SECONDS AND N 1 FOOT AT 3 SECONDS. PATCHY FOG IN THE MORNING
WITH VSBY 1 TO 3 NM.
TUE NIGHT
NW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S
3 FT AT 7 SECONDS AND SE 2 FT AT 8 SECONDS.
WED AND WED NIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: SE 2 FT AT 6 SECONDS AND SE 1 FOOT AT 10 SECONDS.
THU AND THU NIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. A CHANCE
OF SHOWERS.
FRI AND FRI NIGHT
NE WINDS 10 TO 15 KT, BECOMING E 5 TO 10 KT.
SEAS 2 TO 3 FT.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ256-171200-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
703 PM EDT SUN AUG 16 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM EDT MONDAY THROUGH
LATE MONDAY NIGHT...
TONIGHT
S WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT, BUILDING TO 3 TO 5 FT AFTER MIDNIGHT.
WAVE DETAIL: SE 2 FT AT 4 SECONDS AND SE 1 FOOT AT 9 SECONDS,
BECOMING SE 3 FT AT 5 SECONDS AND SE 1 FOOT AT 9 SECONDS. A
CHANCE OF SHOWERS AFTER MIDNIGHT.
MON
S WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 4 TO
6 FT. WAVE DETAIL: SE 4 FT AT 5 SECONDS AND SE 1 FOOT AT
9 SECONDS. PATCHY FOG. SHOWERS LIKELY IN THE MORNING. A CHANCE OF
SHOWERS IN THE AFTERNOON. VSBY 1 TO 3 NM.
MON NIGHT
E WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. SEAS
4 TO 5 FT. WAVE DETAIL: SE 4 FT AT 6 SECONDS AND SE 4 FT AT
9 SECONDS. PATCHY FOG. VSBY 1 TO 3 NM IN THE EVENING.
TUE
N WINDS AROUND 10 KT, BECOMING NW IN THE AFTERNOON. SEAS
3 TO 4 FT. WAVE DETAIL: S 4 FT AT 8 SECONDS AND NE 1 FOOT AT
3 SECONDS.
TUE NIGHT THROUGH WED NIGHT
SW WINDS 10 TO 15 KT. SEAS 2 TO
3 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS AND SE 3 FT AT 8 SECONDS.
THU AND THU NIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: W 2 FT AT 5 SECONDS AND SE 2 FT AT 9 SECONDS. A CHANCE OF
SHOWERS.
FRI AND FRI NIGHT
NE WINDS 10 TO 15 KT, BECOMING E 5 TO 10 KT.
SEAS 2 TO 3 FT.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ232-171200-
NANTUCKET SOUND-
703 PM EDT SUN AUG 16 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH
MONDAY EVENING...
TONIGHT
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: SE 2 FT AT 3 SECONDS AND SE 1 FOOT
AT 11 SECONDS. A CHANCE OF SHOWERS AFTER MIDNIGHT.
MON
S WINDS AROUND 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
4 FT. WAVE DETAIL: SE 2 FT AT 4 SECONDS AND SE 1 FOOT AT
10 SECONDS. A CHANCE OF SHOWERS IN THE MORNING, THEN SHOWERS
LIKELY IN THE AFTERNOON. PATCHY FOG IN THE AFTERNOON WITH VSBY
1 TO 3 NM.
MON NIGHT
SE WINDS 10 TO 15 KT, BECOMING NE 5 TO 10 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: S 2 FT AT 6 SECONDS AND SE
2 FT AT 10 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS. VSBY 1 TO
3 NM.
TUE
N WINDS AROUND 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: NE
1 FOOT AT 3 SECONDS AND SW 1 FOOT AT 7 SECONDS. PATCHY FOG IN THE
MORNING.
TUE NIGHT
N WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: NE 1 FOOT AT 3 SECONDS AND SW 1 FOOT AT
6 SECONDS.
WED AND WED NIGHT
SW WINDS 10 TO 15 KT. SEAS AROUND 2 FT. WAVE
DETAIL: SW 2 FT AT 4 SECONDS AND E 1 FOOT AT 7 SECONDS.
THU AND THU NIGHT
W WINDS 10 TO 15 KT. SEAS AROUND 2 FT. A
CHANCE OF SHOWERS.
FRI AND FRI NIGHT
NE WINDS AROUND 10 KT, BECOMING E. SEAS
AROUND 2 FT.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ233-171200-
VINEYARD SOUND-
703 PM EDT SUN AUG 16 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM EDT MONDAY THROUGH
LATE MONDAY NIGHT...
TONIGHT
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: S 2 FT AT 5 SECONDS AND SE 1 FOOT AT
9 SECONDS. A CHANCE OF SHOWERS AFTER MIDNIGHT.
MON
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
4 FT. WAVE DETAIL: S 3 FT AT 5 SECONDS AND SE 1 FOOT AT
9 SECONDS. PATCHY FOG. SHOWERS LIKELY, MAINLY IN THE MORNING.
VSBY 1 TO 3 NM.
MON NIGHT
SE WINDS 5 TO 10 KT, BECOMING NE AFTER MIDNIGHT.
SEAS 2 TO 4 FT. WAVE DETAIL: SE 4 FT AT 10 SECONDS AND S 3 FT AT
5 SECONDS. PATCHY FOG. VSBY 1 TO 3 NM.
TUE
N WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT
AT 6 SECONDS AND SE 2 FT AT 9 SECONDS. PATCHY FOG IN THE MORNING.
TUE NIGHT
W WINDS AROUND 5 KT. SEAS AROUND 2 FT. WAVE DETAIL:
S 2 FT AT 7 SECONDS AND NE 1 FOOT AT 3 SECONDS.
WED AND WED NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 5 SECONDS AND E 1 FOOT
AT 6 SECONDS.
THU AND THU NIGHT
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT. A
CHANCE OF SHOWERS.
FRI AND FRI NIGHT
NE WINDS 5 TO 10 KT, BECOMING E. SEAS AROUND
2 FT, THEN 1 FOOT OR LESS.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ234-171200-
BUZZARDS BAY-
703 PM EDT SUN AUG 16 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM EDT MONDAY THROUGH
LATE MONDAY NIGHT...
TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: S 2 FT AT 3 SECONDS AND E 2 FT AT 4 SECONDS. A
CHANCE OF SHOWERS AFTER MIDNIGHT.
MON
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
4 FT. WAVE DETAIL: SE 3 FT AT 5 SECONDS AND SE 1 FOOT AT
9 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS. VSBY 1 TO 3 NM.
MON NIGHT
SE WINDS 5 TO 10 KT, BECOMING NE AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: SE 3 FT AT 10 SECONDS AND S 2 FT AT
6 SECONDS. PATCHY FOG. VSBY 1 TO 3 NM.
TUE
N WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SE 2 FT
AT 9 SECONDS AND NE 1 FOOT AT 2 SECONDS. PATCHY FOG IN THE
MORNING.
TUE NIGHT
NE WINDS AROUND 5 KT, BECOMING W AFTER MIDNIGHT.
SEAS AROUND 2 FT. WAVE DETAIL: NE 1 FOOT AT 2 SECONDS AND SW
1 FOOT AT 6 SECONDS.
WED AND WED NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 4 SECONDS AND E 1 FOOT AT
6 SECONDS.
THU AND THU NIGHT
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT. A
CHANCE OF SHOWERS.
FRI AND FRI NIGHT
NE WINDS 5 TO 10 KT, BECOMING E. SEAS 1 FOOT
OR LESS.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ235-171200-
RHODE ISLAND SOUND-
703 PM EDT SUN AUG 16 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM EDT MONDAY THROUGH
LATE MONDAY NIGHT...
TONIGHT
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER MIDNIGHT.
SEAS 2 TO 4 FT. WAVE DETAIL: S 3 FT AT 4 SECONDS AND SE 1 FOOT AT
9 SECONDS. A CHANCE OF SHOWERS AFTER MIDNIGHT.
MON
S WINDS 15 TO 20 KT, BECOMING SE 10 TO 15 KT IN THE
AFTERNOON. SEAS 4 TO 6 FT. WAVE DETAIL: S 4 FT AT 5 SECONDS AND
SE 1 FOOT AT 9 SECONDS. PATCHY FOG. SHOWERS LIKELY IN THE
MORNING. A CHANCE OF SHOWERS IN THE AFTERNOON. VSBY 1 TO 3 NM.
MON NIGHT
E WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. SEAS
3 TO 5 FT. WAVE DETAIL: S 5 FT AT 9 SECONDS AND SE 4 FT AT
6 SECONDS. PATCHY FOG. VSBY 1 TO 3 NM IN THE EVENING.
TUE
N WINDS 5 TO 10 KT, BECOMING W IN THE AFTERNOON. SEAS 2 TO
4 FT. WAVE DETAIL: S 4 FT AT 7 SECONDS AND NE 1 FOOT AT
3 SECONDS.
TUE NIGHT THROUGH WED NIGHT
W WINDS 10 TO 15 KT. SEAS 2 TO
3 FT. WAVE DETAIL: SE 3 FT AT 8 SECONDS.
THU AND THU NIGHT
W WINDS 10 TO 15 KT, DIMINISHING TO 5 TO
10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 5 SECONDS AND E
1 FOOT AT 6 SECONDS. A CHANCE OF SHOWERS.
FRI AND FRI NIGHT
NE WINDS 5 TO 10 KT, BECOMING E. SEAS AROUND
2 FT.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ237-171200-
BLOCK ISLAND SOUND-
703 PM EDT SUN AUG 16 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM EDT MONDAY THROUGH
LATE MONDAY NIGHT...
TONIGHT
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER MIDNIGHT.
SEAS 2 TO 4 FT. WAVE DETAIL: SE 3 FT AT 4 SECONDS AND SE 1 FOOT
AT 9 SECONDS. A CHANCE OF SHOWERS AFTER MIDNIGHT.
MON
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
5 FT. WAVE DETAIL: SE 4 FT AT 5 SECONDS AND SE 1 FOOT AT
9 SECONDS. PATCHY FOG. SHOWERS LIKELY IN THE MORNING. A CHANCE OF
SHOWERS IN THE AFTERNOON. VSBY 1 TO 3 NM.
MON NIGHT
NE WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. SEAS
3 TO 4 FT. WAVE DETAIL: SE 3 FT AT 6 SECONDS AND SE 2 FT AT
9 SECONDS. PATCHY FOG IN THE EVENING.
TUE
N WINDS 5 TO 10 KT, BECOMING SW IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: SE 3 FT AT 7 SECONDS.
TUE NIGHT THROUGH WED NIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO
3 FT. WAVE DETAIL: SE 2 FT AT 7 SECONDS.
THU AND THU NIGHT
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: W 1 FOOT AT 5 SECONDS AND E 1 FOOT AT 6 SECONDS. A CHANCE
OF SHOWERS.
FRI AND FRI NIGHT
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ230-171200-
BOSTON HARBOR-
703 PM EDT SUN AUG 16 2026
TONIGHT
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT THIS EVENING.
WAVES AROUND 2 FT. A CHANCE OF SHOWERS AFTER MIDNIGHT.
MON
S WINDS 5 TO 10 KT. WAVES AROUND 2 FT. PATCHY FOG. A
CHANCE OF SHOWERS. VSBY 1 TO 3 NM.
MON NIGHT
E WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. WAVES
1 FOOT OR LESS. PATCHY FOG. A CHANCE OF SHOWERS IN THE EVENING
WITH VSBY 1 TO 3 NM.
TUE
NE WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS. PATCHY FOG IN
THE MORNING.
TUE NIGHT
NE WINDS AROUND 5 KT, BECOMING W AFTER MIDNIGHT.
WAVES 1 FOOT OR LESS.
WED AND WED NIGHT
W WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS.
THU AND THU NIGHT
W WINDS AROUND 5 KT. WAVES 1 FOOT OR LESS. A
CHANCE OF SHOWERS.
FRI AND FRI NIGHT
NE WINDS 5 TO 10 KT, BECOMING SE. WAVES
1 FOOT OR LESS.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ236-171200-
NARRAGANSETT BAY-
703 PM EDT SUN AUG 16 2026
TONIGHT
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER MIDNIGHT.
WAVES 2 TO 3 FT. A CHANCE OF SHOWERS AFTER MIDNIGHT.
MON
SE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. WAVES 2 TO
4 FT. PATCHY FOG. SHOWERS LIKELY IN THE MORNING. A CHANCE OF
SHOWERS IN THE AFTERNOON. VSBY 1 TO 3 NM.
MON NIGHT
NE WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT.
WAVES 2 TO 3 FT. PATCHY FOG. VSBY 1 TO 3 NM IN THE EVENING.
TUE
N WINDS 5 TO 10 KT, BECOMING NW IN THE AFTERNOON. WAVES
AROUND 2 FT.
TUE NIGHT
S WINDS AROUND 5 KT, BECOMING W AFTER MIDNIGHT.
WAVES AROUND 2 FT.
WED AND WED NIGHT
W WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
THU AND THU NIGHT
W WINDS 5 TO 10 KT. WAVES AROUND 2 FT. A
CHANCE OF SHOWERS.
FRI AND FRI NIGHT
NE WINDS 5 TO 10 KT, BECOMING E. WAVES
AROUND 2 FT, THEN 1 FOOT OR LESS.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ280-171200-
OCEAN WATERS FROM THE MERRIMACK RIVER TO PLYMOUTH FROM 40 TO
60 NM-
703 PM EDT SUN AUG 16 2026
TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
4 FT. WAVE DETAIL: S 3 FT AT 4 SECONDS AND N 1 FOOT AT 3 SECONDS.
A SLIGHT CHANCE OF SHOWERS AFTER MIDNIGHT.
MON
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
5 FT. WAVE DETAIL: SE 3 FT AT 4 SECONDS AND SE 1 FOOT AT
9 SECONDS. A CHANCE OF SHOWERS. PATCHY FOG IN THE AFTERNOON WITH
VSBY 1 TO 3 NM.
MON NIGHT
SE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
BECOMING E 5 TO 10 KT AFTER MIDNIGHT. SEAS 4 TO 5 FT. WAVE
DETAIL: SE 3 FT AT 5 SECONDS AND SE 2 FT AT 9 SECONDS. PATCHY
FOG. A CHANCE OF SHOWERS. VSBY 1 TO 3 NM.
TUE
NE WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: SE 4 FT
AT 8 SECONDS AND S 3 FT AT 7 SECONDS. PATCHY FOG IN THE MORNING.
TUE NIGHT
N WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT. SEAS
3 TO 4 FT. WAVE DETAIL: SE 4 FT AT 8 SECONDS AND S 3 FT AT
8 SECONDS.
WED AND WED NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: SE 3 FT AT 7 SECONDS AND NE 1 FOOT
AT 4 SECONDS.
THU AND THU NIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. A CHANCE
OF SHOWERS.
FRI AND FRI NIGHT
NE WINDS 5 TO 10 KT, BECOMING SE. SEAS 2 TO
3 FT.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ281-171200-
OCEAN WATERS FROM PROVINCETOWN TO NANTUCKET FROM 20 TO 60 NM-
703 PM EDT SUN AUG 16 2026
TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: S 2 FT AT 5 SECONDS AND N 1 FOOT AT 4 SECONDS.
MON
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
4 FT, BUILDING TO 4 TO 6 FT IN THE AFTERNOON. WAVE DETAIL: S 2 FT
AT 4 SECONDS AND SE 1 FOOT AT 9 SECONDS, BECOMING SE 3 FT AT
5 SECONDS AND SE 1 FOOT AT 10 SECONDS. A CHANCE OF SHOWERS.
PATCHY FOG IN THE AFTERNOON WITH VSBY 1 TO 3 NM.
MON NIGHT
SE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE
EVENING. SEAS 5 TO 6 FT. WAVE DETAIL: S 5 FT AT 7 SECONDS AND SE
4 FT AT 10 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS. VSBY 1 TO
3 NM, DECREASING TO 1 NM OR LESS AFTER MIDNIGHT.
TUE
NE WINDS AROUND 10 KT, BECOMING N IN THE AFTERNOON. SEAS
4 TO 6 FT. WAVE DETAIL: S 5 FT AT 7 SECONDS AND SE 5 FT AT
8 SECONDS. PATCHY FOG IN THE MORNING WITH VSBY 1 NM OR LESS.
TUE NIGHT
NW WINDS 5 TO 10 KT. SEAS 3 TO 5 FT. WAVE DETAIL: SW
3 FT AT 7 SECONDS AND SE 3 FT AT 8 SECONDS.
WED AND WED NIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: SE 3 FT AT 7 SECONDS AND NE 1 FOOT AT 4 SECONDS.
THU
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. A CHANCE OF SHOWERS.
THU NIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. A CHANCE OF
SHOWERS.
FRI AND FRI NIGHT
NE WINDS 5 TO 10 KT, BECOMING E. SEAS AROUND
3 FT.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ282-171200-
OCEAN WATERS FROM MARTHAS VINEYARD TO NANTUCKET FROM 25 TO 60 NM-
703 PM EDT SUN AUG 16 2026
TONIGHT
S WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT AFTER
MIDNIGHT. SEAS 2 TO 4 FT. WAVE DETAIL: S 2 FT AT 6 SECONDS AND NE
1 FOOT AT 4 SECONDS.
MON
S WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT IN THE
AFTERNOON. GUSTS UP TO 25 KT. SEAS 4 TO 6 FT. WAVE DETAIL: S 5 FT
AT 5 SECONDS AND SE 1 FOOT AT 9 SECONDS. SHOWERS LIKELY. PATCHY
FOG IN THE AFTERNOON WITH VSBY 1 TO 3 NM.
MON NIGHT
SE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE
EVENING. SEAS 5 TO 6 FT. WAVE DETAIL: S 5 FT AT 7 SECONDS AND SE
3 FT AT 11 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS IN THE
EVENING. VSBY 1 TO 3 NM.
TUE
NW WINDS AROUND 10 KT. SEAS 4 TO 6 FT. WAVE DETAIL: S 5 FT
AT 7 SECONDS AND SE 3 FT AT 10 SECONDS. PATCHY FOG IN THE MORNING
WITH VSBY 1 TO 3 NM.
TUE NIGHT
NW WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: W
3 FT AT 7 SECONDS AND E 2 FT AT 7 SECONDS.
WED AND WED NIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: S 2 FT AT 6 SECONDS AND SE 2 FT AT 10 SECONDS.
THU AND THU NIGHT
W WINDS 5 TO 10 KT. SEAS AROUND 3 FT. A
CHANCE OF SHOWERS.
FRI AND FRI NIGHT
NE WINDS 5 TO 10 KT. SEAS AROUND 3 FT. A
CHANCE OF SHOWERS.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ283-171200-
OCEAN WATERS FROM MONTAUK NY TO MARTHAS VINEYARD FROM 25 TO 60 NM-
703 PM EDT SUN AUG 16 2026
TONIGHT
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER MIDNIGHT.
SEAS 2 TO 3 FT, BUILDING TO 3 TO 5 FT AFTER MIDNIGHT. WAVE
DETAIL: S 2 FT AT 4 SECONDS AND SE 1 FOOT AT 10 SECONDS, BECOMING
S 3 FT AT 5 SECONDS AND SE 1 FOOT AT 9 SECONDS. A CHANCE OF
SHOWERS AFTER MIDNIGHT.
MON
S WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 5 TO
6 FT. WAVE DETAIL: S 4 FT AT 5 SECONDS AND SE 1 FOOT AT
9 SECONDS. PATCHY FOG. SHOWERS LIKELY. VSBY 1 TO 3 NM.
MON NIGHT
S WINDS AROUND 10 KT, BECOMING N AFTER MIDNIGHT.
SEAS 4 TO 6 FT. WAVE DETAIL: S 4 FT AT 7 SECONDS AND SE 3 FT AT
8 SECONDS. PATCHY FOG.
TUE
N WINDS 5 TO 10 KT. SEAS 3 TO 5 FT. WAVE DETAIL: S 4 FT AT
8 SECONDS AND N 1 FOOT AT 3 SECONDS.
TUE NIGHT THROUGH WED NIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO
3 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS AND SE 2 FT AT 8 SECONDS.
THU AND THU NIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: SW 2 FT AT 4 SECONDS AND SE 2 FT AT 9 SECONDS. A CHANCE
OF SHOWERS.
FRI AND FRI NIGHT
NE WINDS 10 TO 15 KT, BECOMING E 5 TO 10 KT.
SEAS AROUND 3 FT.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
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